Additional file 1.

Mitochondrial genome arrangements of 42 Chelicerata. Graphical linearisation of the mt genomes was done according to [32] (see Fig. 3). Corresponding GenBank accession numbers are between brackets. The position of trnL2 is grey shaded. Protein coding and rRNA genes are abbreviated as in the Abbreviations
section; tRNA genes are abbreviated using the one-letter amino acid code. Small non-coding
regions (> 50bp) are indicated as gaps between genes. Braces accentuate the duplicated
region in the mt genome of M. occidentalis.